Question

let A=<1,2> is a vector and u=<2,1>. how can v find A as sum of vector || to u and prep. to u

Answer 1

any thoughts?

Answer 2

Did I miss what you were going to write? I know its a confusing one...

Answer 3

http://www.engin.brown.edu/courses/en3/Notes/Vector_Web2/vectors5/Vectors5.htm
scroll down to section 5.5

Answer 4

That does not answer my question...does it?

Answer 5

"let A=<1,2> is a vector and u=<2,1>. how can v find A as sum of vector || to u and prep. to u"

A<1,2> and U<2,1>: Find "A" as a sum of vector magnitude to "U" and perpendicular to "U". is that the question?

Answer 6

||A|| = sqrt(5) ||U|| = sqrt(5)

find a vector with "2sqrt(5)", that is perpendicular to U<2,1> ?